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By modeling the typical electromechanical transient of grid-tied PWM inverters, this paper firstly proves that PWM inverters and Rotational Synchronous Generators (RSGs) are similar in physical mechanism and equivalent in mathematical model, and the concept of Static Synchronous Generator (SSG) is thereby developed. Furthermore, the rationality and feasibility of migrating the concepts, tools and...
Impedance is very important for power electronic systems because of the close relationship between impedance and system stability. The power converters are typical nonlinear dynamic systems in frequency domain. With a sinusoidal input voltage perturbation excitation, the input current contains not only the input perturbation frequency, but also multiple other frequency components. Therefore, the input...
This paper has provided a practical design architecture of three-phase grid-connected photovoltaic power generation inverter, converting direct current from photovoltaic array to alternating current whose phase and amplitude are the same as the grid. Furthermore, the schemes are described separately from the hardware design, software design and protect-function design. Additionally, based on traditional...
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